Re: [PARPORT] data rates and interrupt frequency of parport

From: Tim Waugh (twaugh@redhat.com)
Date: Sun Oct 28 2001 - 17:30:36 EST

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    On Sun, Oct 28, 2001 at 07:34:39PM +0000, matt wrote:

    > I've found various information saying that my parallel port
    > should support data rates at up to 2MB/s. I think that this
    > must be DMA and hardware helped - so what is a rate that
    > I could expect through 1 pins, with the minimum latency
    > (ie no DMA or buffering)?

    Yes, this speed is what the ECP hardware can do I expect, and so it's
    no good to you when you aren't doing ECP transfers.

    Are you using a PCI parallel port card? You might find that you get
    lower latency that way, since ISA reads are quite slow.

    Tim.
    */


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